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I think the real question is whether or not the basement is finished and to what extent. I am in the planning stages now of a home (5-baths including basement apartment) with a basement and I am hoping to drop 3" lines through to the slab. I am also planing 9' ceilings so I can have soffits at 8' in bathroom and kitchen areas.

Mark

"Somewhere a Village is Missing Twelve Idiots!" - Casey Anthony

I never lost a cent on the jobs I didn't get!

Comment

I think the real question is whether or not the basement is finished and to what extent. I am in the planning stages now of a home (5-baths including basement apartment) with a basement and I am hoping to drop 3" lines through to the slab. I am also planing 9' ceilings so I can have soffits at 8' in bathroom and kitchen areas.

Mark

Right. I ran into one where I had a ceiling height that could not be dropped any further. Meanwhile, I couldn't get the fall to connect them all without coming out of the ceiling.

Multiple drops & horizontal runs.

J.C.

Comment

If you ever want a real challenge, try plumbing a post & beam home which has a flat roof, two story open floor plan, all glass exterior walls and no provisions for installing plumbing. Add to that, it was already framed when we were hired.

Comment

If I have a choice I'm gonna bring them out rather than fight with invert issues on a finished basement.

The last one I did had 30 clear spans so the builder used JLAMS 18" tall on 12" centers, never gonna do a rough that way again. coupling, nipple,coupling,nipple, coupling, nipple, coupling nipple coupling nipple.....

Comment

If you ever want a real challenge, try plumbing a post & beam home which has a flat roof, two story open floor plan, all glass exterior walls and no provisions for installing plumbing. Add to that, it was already framed when we were hired.

Mark

I'd have so many posts in there they'd think they were in jail.

That would be a fun challenge as long as I had the time for it.

J.C.

Comment

Best case scenario is to connect everything in the basement ceiling and go horizontally from there. Chances of having enough room horizontally are against you though. Plus, in earthquake country there are generally structural considerations (steel beams and paralams), not to mention hvac lines that prevent long horizontal runs. And, when we request drop ceilings, the design people start fidgeting over height restrictions and light planes. It all comes down ten gallons of stuff in a five gallon bucket.
J.C., when you say, "Have multiple drops into/through the slab and connect them all outside the structure?", do you mean the basement slab?
Most basements we do are below the main sewer invert, forcing us to use an ejector. When we do this, we do our darnedest not to connect any of the fixtures that are above the invert to the basement waste. But sometimes, 2nd and 3rd story fixtures just can't get there from here, so we end up running them through the ejector.

Comment

If you ever want a real challenge, try plumbing a post & beam home which has a flat roof, two story open floor plan, all glass exterior walls and no provisions for installing plumbing. Add to that, it was already framed when we were hired.